How can cytotoxic t-cells be activated? Helper T cells take the antigens and detach them from
the pathogens, then transport them to the cytotoxic
t-cells to inject activation serum.
or
Some infected cells and macrophages will display the
antigens from the pathogen on their own surfaces,
which act as signals to t-cells to attack.

answer: although many types of viruses can cause a common cold, rhinoviruses are the most common culprit. a cold virus enters your body through your mouth, eyes or nose. the virus can spread through droplets in the air when someone who is sick coughs, sneezes or talks. theres your answer

explanation:

i think the answer is c hope this