In a sales mix situation, at any level of units sold, net income will be higher if more lower contribution margin units are sold than higher contribution margin units. more higher contribution margin units are sold than lower contribution margin units. more fixed expenses are incurred. weighted-average unit contribution margin decreases.

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.

the answer to this is proletariats.

hope this : )