A set of 10 new questions in each round. Question: ( 1 of 10 ) If Amy can finish the work in 68 days and Keith can finish the same work in 73 days, then in how many days both can finish the work together? (A) 141 days (B) 70 29/141 days or 70.206 days (C) 70.5 days (D) 35 29/141 days or 35.206 days