A 0100-M Long Solenoid Has a Radius of 0

A 0.100-m long solenoid has a radius of 0.050 m and 1.50 × 10⁴ turns.The current in the solenoid changes at a rate of 6.0 A/s.A conducting loop of radius 0.0200 m is placed at the center of the solenoid with its axis the same as that of the solenoid as shown.

-What is the magnetic flux through the small loop when the current through the solenoid is 2.50 A?

A) 2.95 × 10^-² Wb
B) 7.28 × 10^-² Wb
C) 2.95 × 10^-⁴ Wb
D) 4.38 × 10^-⁴ Wb
E) 5.92 × 10^-⁴ Wb