Divide. (7t^5 + 14t^4 − 28t^3 + 35t^2) ÷ (7t^2) step by step pls

a. t^3 + 2t^2 − 4t + 5
b. t^3 − 2t^2 − 4t + 5
c. t^7 + 2t^2 − 4t + 5
d. t^3 + 2t^2 − 4t − 5