The relevant information is: Kaycee Stroh (born May 29, 1984) is an American actress, singer and dancer, best known for her role as Martha Cox in the hit Disney Channel Original Movies, High School Musical (2006), High School Musical 2 (2007), and High School Musical 3: Senior Year (2008).
This justifies what answer for what question? Q & A:
Passage: Kaycee Stroh (born May 29, 1984) is an American actress, singer and dancer, best known for her role as Martha Cox in the hit Disney Channel Original Movies, High School Musical (2006), High School Musical 2 (2007), and High School Musical 3: Senior Year (2008). She was a contestant in the VH1 reality show Celebrity Fit Club.

Question: Based on this passage, who plays martha cox in high school musical?
Kaycee Stroh