请选择DCBA2Q8q.i*m1S6N,t*`;u5J6e:L Is that a backpack? Yes, ________ is.0d8x'Q8}7v5X,~,q;s-Z0O']
A. it0d8x'Q8}7v5X,~,q;s-Z0O']
B. this0d8x'Q8}7v5X,~,q;s-Z0O']
C. that0d8x'Q8}7v5X,~,q;s-Z0O']
D. it’s0d8x'Q8}7v5X,~,q;s-Z0O']