Will mark branliest for s t upid question. it has to be funny too

Which strategy is an example of how companies may upgrade themselves to meet changing customer preferences? a.doing door-to-door sellingb.using billboards to advertise the productsc. making online shopping services availabled.giving discounts on products

Which of the following is an advantage of solar energy?

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.