Consider the following Statements: Shad Nongkrem dance is for good harvest and prosperity. Mawsynram in Meghalaya receives the world's highest rainfall. Khasi and Jaintia tribes of Meghalaya doesn't practice making out a will, custom prescribes the devolution of ancestral property in the female line. Which of the following statement(s) is/are true?

Meghalaya, a state in northeastern India, is known for its rich cultural heritage and unique geographical features. The question revolves around three statements related to Meghalaya's culture and geography, and we need to determine which of these statements are true.

1. **Shad Nongkrem Dance**: This is a significant cultural event celebrated by the Khasi people of Meghalaya. The dance is performed during the autumn season, primarily to seek blessings for a good harvest and prosperity. It is a vibrant festival that showcases the rich cultural heritage of the Khasi community. The dance is not just a celebration but also a way to preserve and promote the cultural identity of the Khasi people.

2. **Mawsynram Rainfall**: Mawsynram, a village in the East Khasi Hills district of Meghalaya, is known for receiving the world's highest rainfall. This fact is well-documented and recognized globally. The high rainfall is due to the region's unique geographical location and the monsoon winds that bring heavy precipitation. This makes Mawsynram a significant geographical landmark in terms of rainfall statistics.

3. **Khasi and Jaintia Tribes' Inheritance Practices**: The Khasi and Jaintia tribes of Meghalaya follow a matrilineal system of inheritance. In this system, property and lineage are passed down through the female line. This means that the youngest daughter (known as the "Ka Khadduh") inherits the ancestral property. This practice is deeply rooted in the cultural and social fabric of these tribes and is a unique feature of Meghalaya's society.

Each of these statements is true and reflects important aspects of Meghalaya's culture and geography. The Shad Nongkrem dance is a cultural event that promotes good harvest and prosperity, Mawsynram is recognized for its high rainfall, and the Khasi and Jaintia tribes follow a matrilineal system of inheritance. Therefore, the correct answer is that all three statements are true, making option C the correct choice.