Rahnl was looking for his coach. He went 80 in in the east before turning to his right. He went 10 m before turning to his right again and then went 20 m away from that point. From there he went 90 in to the with before meeting his coach in a ground. What was the smallest distance between the starting point and the position of his coach?

A

100 m

B

120 m

C

140 m

D

210 m