it is B
in choice c was should be were
in choice d liked should be like
in choice a, know should be knew
I can not explain how he perceives or views that, but here is my shot at it.
"without a struggle, there is no progress"
What in life goes without an obstacle? can you cross the street without looking both ways, yes but you'll most likely be hit by a car. See without taking that extra second you'll not make the progress you'll just keep backpedaling or you end up dead if you follow the example ha!
(In conclusion)
There is little chance without putting in work that you'll actually succeed. <span />
