a)can daughter sue their parent for broken the promise under contract law? explain

b) A picked up a top from a track under $100 and going to buy. the cashier said the dress were place in the wrong track. it worth $400 the shop refused to sell less then $200 as the top is brand name and good quality ? can A sue them for breach of contract ? explain

c) after bought the top A found that the quality is poor and not brand designer after first wear ? explain A's rights