Why did the british want to expand control into the ohio river valley in the mid 1700s

a.to force the french out of north america
b.to put french settlers there under english rule
c. to demonstrate britain's strength to france ans spain
d.to gain access to the regions natural resources

"To gain access to the regions natural resources" is the one among the following choices given in the question that best describe why the British wanted to expand control into the Ohio river valley in the mid 1700s. The correct option among all the options that are given in the question is the last option or option "d". 

Well I assume that the populist party is no more after the election considering there is only two parties now