The correct order of each word in the blank spaces would be: option C.
"There is more than one way to see if they're in their proper spaces."
<em>'There'</em> is an adverb of place or position, '<em>they're'</em> is a contraction of they are (which refers to two or more people), and '<em>their'</em> is the possesive case of the pronoun they.
The march on washington purpose was for jobs and freedom. It demanded civil and economic rights for black americans. The march also helped pass the Civil Rights act of 64'.