What are the explicit equation and domain for an arithmetic sequence with a first term of 8 and a second term of 5?
A. an = 8 − 5(n − 1); all integers where n ≥ 1
B. an = 8 − 5(n − 1); all integers where n ≥ 0
C. an = 8 − 3(n − 1); all integers where n ≥ 1
D. an = 8 − 3(n − 1); all integers where n ≥ 0