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.

Problem: a towel, when bleached, lost 30 % of its length and 25 % of its breadth. what is the percentage decrease in area ?
Options: a. 24 %, b. 30 %, c. 44 %, d. 54 %, e. 47.5 %
e