The answer to the question is C.
From the options given the best one is this one:
<span>Return that is foregone by investing in a project.
Opportunity cost is simply what you could have gained from other options. So the opportunity cost of going for holidays to Cyprus is missing on Malta during the same time (for example)</span>
All i know is that:
3. Multicelluar organisms
sorry , but i hope this helps]
I can help you if you show the graph... so where's the graph?