How did european nations compete for power in the years before world war i?

Europeans competed for power either through acquisition of colonies or building up its industries. When their industries were strong, they would strengthen their armies as well.  If that was not enough they would form alliances with other countries to protect their interest.

b) they want the land taken away from the wealthy landowners and given to peasants.

it would be a. that is the only one i could think of