What are the explicit equation and domain for an arithmetic sequence with a first term of 7 and a second term of 3? A. an = 7 - 4(n - 1); all integers where n greater than or equal to 1
B. an = 7 - 4(n - 1); all integers where n is greater than or equal to 0
C. an = 7 - 3(n - 1); all integers where n is greater than or equal to 1
D. an = 5 - 3(n - 1); all integers where n is greater than or equal to 0