In mid-western North America, the southern boundary of the north polar ice cap during past ice ages is marked by these two rivers Group of answer choices a. the Missouri and North Platte Rivers. b. the Arkansas and Ohio Rivers. c. The North Platte and Ohio Rivers. d. the Missouri and Ohio Rivers.

option d. the Missouri and Ohio Rivers.

Explanation:

During the last ice age, there was reduction in the amount of solar radiation that hits the surface of the erth. As a result of this, some continents experienced a glacial growth and cold climates and the geography was also affected.

North America was covered by ice and the mid-western North America, the southern boundary of the north polar ice cap during past ice ages is marked by Missouri and Ohio Rivers.

ń, wǒ shuō yīngyǔ, dàn wǒ huì shuō qítā yǔyán, rú xībānyá yǔ fǎyǔ yìdàlì yǔ hé pǔtōnghuà, suǒyǐ bùyào pànduàn, dànshì