Question

Which of these is a run-on sentence?
A. I went home and ate and ate.
B. I thought about what he'd said soon I realized he was right.
C. Before lunch, I played volleyball; after lunch I did again.
D. You and I and the whole team will go.

Answer 1

B, since there's no punctuation.

Answer 2

B. I thought about what he'd said soon i realized he was right.

it should say. . . . . . . .

I thought about what he'd said. Soon I realized he was right.