If anyone i will up my points. i need right answer and explanation.

means if you're already damaged some way when you take out a medical insurance you will not get full compensation for that injury that you already have.

c. side angle side. u shares the same sides

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis: