76. There are 5 ways to write 4 as a sum of positive numbers, namely 5, 4+1, 3+2, 2+1+1, 1+1+1+1+1. Note that the order of the summands is irrelevant. How many ways are there to write 8 into a sum of positive numbers, with order or the summands irrelevant? (A) 20 (B) 21 (C) 22 (D) 23