Each person in a group of four can lift 100 pounds when working alone.But when they lift as a group,they can lift 500 pounds.This group has achieved

A) weak synergy
B) strong synergy
C) social facilitation
D) social laboring
E) swarming

Strong Synergy

A situation where combined actions or operations of entities create an outcome greater than the sum of their separate effects.

Social Facilitation

The enhancement of performance observed when an individual performs in the presence of others, compared to when alone.