[单选题]
A mass on a spring undergoes SHM. fnipm28(0. jmpffny(g2+4aq epy+d ixnb47a It goes through 10 complete oscillati5(.qa/oi4u :bnq.q/emn s)rw jq , rbpons in 5.0 s. What is the)/.nqb.nqr 5q(o:amue4 iwjrb, q / sp period?
A. $0.020 \; s$
B. $0.50 \; s$
C. $2.0 \; s$
D. $50 \; s$