Zebra mussels are native to poland and the soviet union. they were probably transported to the united states via trans-oceanic vessels. with no natural predators in the united states, zebra mussels

a)
will eventually die out due to lack of food supplies.

b)
caused a huge decline in native clam and mussel populations.

c)
compete unsuccessfully with native mussels and quickly die.

d)
successfully share the niche with native mussels and clams.