NEED HELP ASAP WILL GIVE BRAINLYEST IF CORRECT Which model shows two equal expressions when a = 4?

A)a + 1 + 1 + 1 + 1 = 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1
B)a + a + a + a = 1
C)a + a = 1 + 1 + 1 + 1 + 1 + 1
D)a + a + a + a = 1 + 1 + 1 + 1