Scientists must carefully weigh the risks and benefits of biotechnology. Which of these is a risk that scientists must consider when genetically engineering a plant?

a. what kinds of nutrients the plant will need

b. how to crossbreed the plant with other plants

c. whether the plant will grow well in different soils

d. whether the plant will cause allergic reaction in humans

Density is calculated as mass divided by volume. We are given the mass of 15.0 grams, so we need to find the volume. For a cube, volume is calculated as (length of side)^3, so in this case, we have the length of a side as 44.5 mm, which is equivalent to 4.45 cm.
Volume = (4.45 cm)^3 = 88.1 cm^3
Then we divide mass by the volume:
Density = (15.0 grams) / (88.1 cm^3) = 0.170 g/cm^3
So the correct answer is A.