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: convert 2 / 5 to a decimal
Options: a. 0.1, b. 0.2, c. 0.3, d. 0.4, e. 0.5
d