Aram's legs are strong enough to hold him up, and he's able to move his legs in a coordinated way as long as his mother supports him. What else does Aram need in order to walk on his own

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.

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

the correct answer is d