Answer: C.

Explanation:
Given:

Now, To convert 80 US dollars (USD) to Australian dollars (AUD) we need to multiply the rate of 1 USD (1 USD = 1.0343 AUD) to 80 US dollars (USD), we will get the write expression.
Therefore, 80 US dollars(USD) =

Hence, the expression can be used to convert 80 US dollars (USD) to Australian dollars (AUD)=
