Answer:
the object will move in the direction of a and d, with a force of 10N acting on it.
Explanation:
the forces b and c cancel each other out because they are equal, but pushing the object in opposite directions. thus, 5N - 5N = 0N and the object does not move.
however, the forces a and d are moving in the same direction. 5N + 5N = 10N, which means that the object will move in the direction of both a and d with a combined force of 10N acting on it.
i hope this helps! :D