A swimmer is swimming in a slowly moving stream. Which of the following is NOT true?
a. To have the largest speed relative to shore, the swimmer should swim downstream.
b. To have the smallest speed relative to shore, the swimmer should swim upstream.
c. The swimmer can achieve the same speed relative to shore swimming upstream or downstream.
d. To cross the river in the shortest amount of time the swimmer should swim perpendicularly across the stream.
e. The swimmer's speed relative to shore will depend on the speed of the stream's current.