A Floating Leaf Bobs Up and Down Two Complete Cycles $10 \mathrm {~m} / \mathrm { s }$

Multiple Choice

A floating leaf bobs up and down two complete cycles each second as water waves pass by at
a speed of $10 \mathrm {~m} / \mathrm { s }$ .How far apart are the waves?

A) 1 meter
B) 2 meters
C) 5 meters
D) 20 meters