Australia's Terms of Trade Trend Period

Steps:

• Define terms of trade as the ratio of export prices to import prices, indicating trade balance health.
• Review historical Australian Bureau of Statistics data for quarterly trends in commodity prices.
• Identify periods of initial decline followed by improvement in the index.
• Match the pattern to the longest span covering decline from mid-2015 lows and recovery into 2017.

Why C is correct:

• From Q3 2015 to Q1 2017, terms of trade declined sharply due to falling commodity prices (e.g., iron ore) before improving with global demand recovery, as per the terms of trade formula (export price index / import price index).

Why the others are wrong:

• A: Steady decline throughout Q2-Q4 2014 with no improvement.
• B: Brief decline in Q1 2015 but no subsequent improvement by Q2.
• D: Minor fluctuations in Q2-Q4 2016 without a clear decline-then-improve pattern.

Final answer: C