All of the following were reasons why settlers overcame barriers in farming the plains except: a. slave labor c. steel tipped plows b. mechanical threshing machines d. windmill powered pumps

I believe the answer is B. hope that helps

c is the awnser that best describes the role of the english monarchy in its consitution

the andes or andean mountains (spanish: cordillera de los andes) are the longest continental mountain range in the world, forming a continuous highland along the western edge of south america. this range is about 7,000 km (4,300 mi) long, about 200 to 700 km (120 to 430 mi) wide (widest between 18° south and 20° south latitude), and of an average height of about 4,000 m (13,000 ft). the andes extend from north to south through seven south american countries: venezuela, colombia, ecuador, peru, bolivia, chile and argentina.

from wikipedia

hope this !