Answer:
the answers are B, C, and E
Explanation:
<span>The biggest problem with the OPA during WWII was controlling prices. Prices were soaring and keeping them down was the biggest problem they faced.</span>
D the serengeti plain here to back up my claim
https://www.worldwildlife.org/ecoregions/at0714
<span>. built dams to provide for irrigation</span>
irrigation was used to farm lands that were originally arid and semi arid<span>4. converted bad land into agricultural fields</span>
<span>these bad lands otherwise ARID AND SEMI ARID were successful reclaimed through irrigation methods.
</span><span></span><span>5. invented new farming methods
</span> improvements in agricultural techniques and tools bolstered the agricultural sector making it one of the important source of taxes for the dynasty.
