Standard V(C) – Record Retention

IN PRACTICE EXAM #V1 #AFTERNOON EXAM 1 #Q11.2, THE ANSWER IS: Welch violated Standard V© – Record Retention by failing to maintain adequate records to support his investment recommendations. In the absence of other regulation, CFA Institute recommends keeping such records for a minimum of seven years. Certainly, one week is not an adequate record retention policy. BUT I CANT FIND THE RELEVANT CONTENT IN THE QUESTION ESSAY , SUCH AS " ONE WEEK "???

hated this question… they didn’t state that until the very end