Which of the following would explain a company's day sales outstanding ratio

rising from $27\mathrm{.}3$ to $38?$

a$.)$ The company's accounts receivable has decreased while total sales has

increased.

b$.)$ The company's accounts receivable has increased while total sales has

remained constant.

c$.)$ The company's accounts receivable has remained constant while total

sales has increased.

d$.)$ The company's accounts receivable has decreased while total sales has

remained constant.