Answer:
D agricultural; manufacturing
Step-by-step explanation:
Vietnam's economy has transformed since the 1970s, moving away from an agricultural-based system and towards a manufacturing-based system. This shift can be seen in the country's increasing production of technology and clothing, which have replaced traditional agricultural products like rice as significant exports. This transition has been driven by a combination of factors, including government policies that have encouraged industrialization and foreign investment and a growing and relatively low-cost labor force. Overall, this shift reflects Vietnam's move from an agricultural-based economy to a more industrialized, manufacturing-based economy.