Dinoflagellate is a type of neurotoxin which is found in the red-tide algae.
The answer is:
d. people can get paralytic shellfish poisoning during dinoflagellate blooms
Dinoflagellate algal blooms, during red-tide, release strong neurotoxins that can be ingested by shellfish and passed on to humans who eat the infected shellfish. The most significant public health problem that has been known to cause this harmful algae poisoning is: Amnesic Shellfish Poisoning (ASP).