After a direct blow to the eyeball with a soccer ball, your athlete complains of double vision and numbness in her cheek. you also notice that she has noticeable swelling and a downward displacement of the injured eye. what injury might you suspect?

In the given case, one may suspect for an orbital fracture.  

An orbital fracture refers to a traumatic injury to the eye socket bone. These injuries are generally the outcome of blunt force trauma to the eye. There are three prime kinds of orbital fractures, which can take place:  

1. Orbital rim fractures take place in the eye socket's bony outer edges.  

2. The blowout fractures take place when the rim remains intact, however, a crack produces in the wafer-thin bone, which forms the eye socket floor.  

3. Direct orbital fractures refer to the rim fractures, which have elongated into the floor.  

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

the answer to your question is tooth decay.