Examine the scenario.

a stream of negatively-charged particles is moving to the right in a magnetic field. the particles experience a force downward.

which situation(s) would result in the particle stream experiencing an upward force?

(select all that apply.)

a. using uncharged particles moving to the right

b. using positively-charged particles moving to the left

c. using negatively-charged particles moving to the left

d. using positively-charged particles moving to the right