The answer is D for this one
Answer:
The development and proliferation of algal blooms likely result from a combination of environmental factors including available nutrients, temperature, sunlight, ecosystem disturbance (stable/mixing conditions, turbidity), hydrology (river flow and water storage levels) and the water chemistry
To start off a is something you should not even think of doing because you can die, for b that's not a good spot as in there can be extra skin coming from the chin, for c you are getting close but as your neck goes to your torso it gets bigger, D is the correct answer as you would get the most accurate measurement its not to close to the chin or your torso.<span />
Less sleep
not eating healthy
no exercise