Concept:The correct sequence of jumbled parts must form a grammatically correct and meaningful sentence.
Explanation:Start with part
R: "a successful" begins the noun phrase "a successful man".
Part
P follows: "man is one who can lay" completes the subject and introduces the verb.
Part
Q comes next: "a firm foundation with the bricks" is the object of the verb "lay".
Part
S ends the sentence: "others have thrown at him" modifies "bricks" and gives closure.
Thus the correct order is RPQS: "A successful man is one who can lay a firm foundation with the bricks others have thrown at him."
Other orders like PQSR, RQSP, or QSPR break grammar or meaning.
Answer:Option C: RPQS