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: the product of two positive integers is 675 and their difference is 2. what is the bigger number ?
Options: a. 21, b. 23, c. 25, d. 27, e. 29
d

Problem: 18.05 ã — 0.001 = ?
Options: a. 0.1805, b. 0.01805, c. 1.805, d. 0.001805, e. none of these
b

Problem: there are 7 executives, including the ceo and cfo, that are asked to form a small team of 4 members. however, the ceo and cfo may not both be assigned to the team. given this constraint, how many ways are there to form the team ?
Options: a. 25, b. 28, c. 30, d. 32, e. 35

a