Answer:
B). Richters'
Step-by-step explanation:
Apostrophe is elucidated as the punctuation mark (') that is employed to either signal the omission of letters or show possession. In case of a singular noun, the apostrophe is put after the noun with letter s to show possession(Mary's book) while in a plural possessive case, the apostrophe(') is put after the s(Bats' handles). As per this rule, the correct form would be Richters' as it correctly show a plural possession. Thus, the final interrogative statement reads as:
What is the fastest way to get to the Richters' house?