He ___ reading and thinking while he ___ it

He ___ reading and thinking while he ___ it
Past Papers: Board of Revenue (BoR) — Past Paper MCQs BoR Naib Tehsildar — Past Paper MCQs
A: Kept/had read
B: Keep/had read
C: Kept/read
D: None of these

Kept reading thinking while read for concurrency. Option C.