Substitute to Find the Value of the Expression $d$ Miles Is $\frac{\mathrm{d}}{551}$

Multiple Choice

Substitute to find the value of the expression.
-A plane flies at 551 miles per hour. The time, in hours, for the plane to travel a distance of $d$ miles is $\frac{\mathrm{d}}{551}$ . How long will it take for the plane to travel 3857 miles?

A) $7 \mathrm{hr}$
B) $2,125,207 \mathrm{hr}$
C) $10 \mathrm{hr}$
D) $0.14 \mathrm{hr}$