At last the people .... outside were invited in A)which was waiting B)what were waiting C)which were waiting D)who were

At last the people who were waiting outside were invited inA)which was waiting B)what were waiting C)which were waiting D)who were waiting E)who was waitingПравильный ответ - D, так как:- which and what больше относятся к неодушевленным предметам- who - к людямИтого остается 2 варианта - D и E. Но так как в предложении стоит \"people\" (людИ, множественное число), подходит только до, т.к. were употребляется с мн.ч., was - только с ед.ч.