Teacher:Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
Teacher: Now, understand the problem? Solve this instance: Problem: dacid obtained 90, 92, 85, 87 and 85 marks ( out of 100 ) in english, mathematics, physics, chemistry and biology. what are his average marks ?
Options: a. 67, b. 26, c. 88, d. 90, e. 75
Student:
c