What is the DNA complementary base strands for AAT GGC TAC

The nitrogenous bases are Adenine (A), Guanine (G), Thymine (T), Cytosine (C), and Uracil (U). A pairs with T in DNA and with U in RNA. C always pairs with G. This question is worded funny, but I believe it's asking you to find the complementary strand of DNA (remember all DNA has two strands!).
When you look at a strand of DNA or RNA, you can figure out what the complementary strand is by writing the match to each base on the parent strand (which is the strand you were given). So, if your strand of DNA gave you a C, you know it will be matched to a G on the complementary strand.
So, for the strand of DNA you were given, the complementary strand would be ATG/GCG/GGA/ACG/CAT/GAG/TGA

The answer is telescope.