On the Statement of Cash Flows, an increase in short$-$term notes payable $($STNP$)$ over the year is a:

a$..$ source of funds; find it in the section titled CF operating activities

b$.$ use of funds; find it in the section titled CF operating activities

c$.$ source of funds; find it in the section titled CF investing activities

d$.$ use of funds; find it in the section titled CF investing activities

e$.$ source of funds; find it in the section titled CF financing activities

f$.$ use of funds; find it in the section titled CF financing activities