Please guide me through with one correct ans on the above qns reference to python 3, thank you

with explaination

List the advantages a programmer gains by using supplied classes in programs 1. the class documentation Instead of reading code for the class, the programmer reads The code for the class has been tested before being deployed. Thus, the programmer needs to test only his new code. Modification to the class does not affect the code of the programmer. Only statements i and ii Only statement ii and ii All 3 statements i, ii and iii Only statement i and