Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

Risks in infrastructure investing are most likely greatest when the project involves:
Option A:construction of infrastructure assets.
Option B:investment in existing infrastructure assets.
Option C:investing in assets that will be leased back to a government.

Answer: A