Two scientists in British Columbia are counting trout spawning grounds (called redds) along 5 km of a stream. The presence of milky-colored fish spawn indicates a redd. The scientists walk together, surveying the same areas.


What is the most likely reason for them to count different numbers of redds?


Responses


The two scientists study different sections of the stream.


The two scientists study different sections of the stream.


The number of redds is too small a sample to be counted accurately.


The number of redds is too small a sample to be counted accurately.


Some places look as if they might or might not be redds, and different scientists identify them differently.


Some places look as if they might or might not be redds, and different scientists identify them differently.


The satellite sensor that is collecting data from the stream is malfunctioning.