Account Receivables lag impacts sales. At no credit terms, the customer survey score falls to about ______ % of maximum, at 30 days, the score is _____ %, at 60 days, the score is ______%.
a) 60%; 50%; 40%
b) 100%; 80%; 60%
c) 80%; 70%; 60%
d) 50%; 40%; 30%