The Treasury introduces a fiscal package combining job-creation projects, targeted tax relief for low-income earners, and measures to support exports. Together, these policies are intended to promote which combination of macroeconomic objectives?

• Job-creation projects directly aim to increase employment levels in the economy. This aligns with the macroeconomic objective of full employment.

• Targeted tax relief for low-income earners is a measure designed to shift disposable income towards those with lower incomes. This directly promotes the macroeconomic objective of redistribution of wealth.

• Measures to support exports are intended to boost a country's export performance. A strong export sector contributes to a favorable balance of payments, which is a key aspect of external stability.

The policies collectively aim to promote:

• Full employment (from job-creation projects)
• Redistribution of wealth (from targeted tax relief)
• External stability (from measures to support exports)

Comparing this combination with the given options:

• A. Full employment, redistribution of wealth, and external stability - This matches our analysis.
• B. Price stability, redistribution of wealth, and economic growth - Price stability is not a direct objective of these policies; in fact, stimulating demand could potentially lead to inflation.
• C. Full employment, economic growth, and price stability - Again, price stability is not a direct objective.
• D. Redistribution of wealth, external stability, and inflation - Inflation is generally a problem to be controlled, not an objective to be promoted.

Therefore, option A best represents the combination of macroeconomic objectives promoted by the described fiscal package.

The final answer is $\boxed{\text{A. Full employment, redistribution of wealth, and external stability}}$.