When was the Second Crusade?

Martin, a 32-year-old human relations administrator at a university, believes that all professors over age 50 are incapable of learning the new educational technologies and are content to keep presenting their same "tired, boring" lectures. he often expresses these views to other administrators and does not encourage any of the "older" faculty members to attend professional development meetings related to new teaching approaches nor does he suggest that the university send them to any of the technology conferences. martin is exhibiting

This cartoon appeared in 1916. the topic of the cartoon isa)the reason for the start of world war i. b)the success of us submarines in world war i. c)the military alliance between germany and mexico. d)the attitude in the us towards submarine warfare in world 

Why is mary salter ainsworth a central figure in psychology?