— I've studied growing plants as one of my interests. Could  I  make some suggestions?

— ___________.  [ ]

A. You will make it    

B. Go right ahead  

C. Don't mention it    

D. Take it easy

已知数列{a_n}是等差数列，a₁₀=10，前10项和S₁₀=70，则其公差d=______．