Options:
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Earlier discussion
3 older comments kept for context.
Adaramola john
Although,ability to carry bulky goods is sure an advantage on its own.But it shouldn't be an advantage over road transportation
Adaramola john
The answer should be C(ability to move round the world),cause I doubt if road could go that limit
Abdulwaris Ishaq
It can’t be the ability to link all part of the country because the whole country isn’t covered with water. The answer is correct already as ship (water transport) is commonly used in carrying bulky goods.