You want to use PCQ and allow 256k maximum download and upload for each client. Choose correct argument values for the required queue.
A . kind=pcq pcq-rate=256000 pcq-classifier=src-address
B . kind=pcq pcq-rate=1256000 pcq-classifier=dst-address
C . kind=pcq pcq-rate=256000 pcq-classifier=dst-address
D . kind=pcq pcq-rate=5000000 pcq-classifier=src-address
E . kind=pcq pcq-rate=5000000 pcq-classifier=dst-address
Answer: A,C