How does Martha find out about the disagreement over whether she should get the jacket?

A. Her grandfather tells her about it
B. Her best friend gives her a note about it
C. She overhears two teachers arguing about it
D. She reads a school newspaper article about it

C. She overhears two teachers arguing about it

C. She overhears two teachers arguing about it

To find the answer to this question, we need to analyze the given choices and determine which one explains how Martha finds out about the disagreement over whether she should get the jacket.

A. Her grandfather tells her about it - This choice suggests that Martha's grandfather informs her about the disagreement. However, there is no mention of her grandfather's involvement in the context provided, so we can exclude this option.

B. Her best friend gives her a note about it - This choice suggests that Martha's best friend gives her a note regarding the disagreement. Again, there is no mention of Martha receiving a note from her friend, so we can exclude this option.

C. She overhears two teachers arguing about it - This choice suggests that Martha overhears two teachers arguing about the disagreement. As per the context, this seems likely since there is no mention of her receiving information from her family or friends. We should consider this as a potential answer.

D. She reads a school newspaper article about it - This choice suggests that Martha learns about the disagreement by reading a school newspaper article. However, there is no mention of Martha reading a newspaper article regarding the disagreement, so we can exclude this option.

Based on the information provided, the most plausible answer is:

C. She overhears two teachers arguing about it

By analyzing the given options and the context, we can conclude that Martha finds out about the disagreement over whether she should get the jacket by overhearing two teachers arguing about it.