‘R’ will be the first part of the given sequence because it completes the fragmented part correctly, that is, ‘From a picnic table we watched them laugh and leap’. ‘P’ will follow next as ‘laughing and leaping’ took place ‘through the playground’. QS will make a pair together as Q states a transition which is reflected with the usage of the word ‘while’ and S will be the last part because ‘basket’ in previous part is used in connection to ‘sandwiches and cookies’. Hence, RPQS is the right sequence. Thus, option (c) is correct.