Services exports improve the invisible trade balance

Steps:

• Identify invisible trade as exports/imports of services like transport, not goods.
• Seek Kenyan service export for favorable (credit) impact on balance.
• Evaluate options: A involves Kenyan transport service; others relate to goods or costs.
• Confirm A credits Kenyan invisible account via service revenue.

Why A is correct:

• Transport contracts are service exports, crediting the invisible account per balance of payments definitions.

Why the others are wrong:

• B: Tea exports are visible goods trade, not services.
• C: Delegation visit incurs Kenyan service import costs, debiting the account.
• D: Zambian exports to Kenya are Kenyan goods imports, worsening visible trade.

Final answer: A