instruction:
You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.
question:
Question: If each of 4 digit code is formed of integers from 1 to 50, inclusively, and each of the digits are different, how many possible codes are there?

Option A: 5527200

Option B: 5586300

Option C: 5598600

Option D: 5547800

Option E: 2569800
answer:
Option A

question:
Question: If k and w are the dimensions of a rectangle that has area 21, and if k and w are integers such that k > w, what is the total number of possible values of k?

Option A: Two

Option B: Three

Option C: Four

Option D: Five

Option E: Six
answer:
Option A

question:
Question: The day of week on July 1,2000 was

Option A: Monday

Option B: Friday

Option C: Saturday

Option D: Tuesday

Option E: None of the above
answer:
Option C