Answer:
(E) allow passengers to get in and out more easily
Explanation:
Option E is correct because there is no need for and since the list is still continuous, the use of more there shows that it is a comparison with another vehicle and it is less awkward.
Option A, B and C are wrong because of the and
A, freshwater freezes at 32 degrees, and saltwater at 28.4 degrees.
It grew very well because of the sun
