[单选题]
A car traveling 60 km/j35 uqeyp. s,a s crz*(q2 y;youu4jkt0,vid4tjsyo jj 16)djz 3i0r2pg)m m:h accelerates at the rate of $2.0 \; m/s^2$. How much time is required for the car to reach a speed of 90 km/h?
A. $15 \; s$
B. $30 \; s$
C. $45 \; s$
D. $4.2 \; s$
