Can I say,<br/><br/>(a) She is happy because she got a bag.<br/><br/> She is happy because her mother gave / gives her a bag.<br/><br/>(b) She was happy, because she has / got a bag.<br/><br/>(c) She felt happy because she got a bag for her present.<br/><br/>(d) She is happy when she saw /sees her bag.<br/><br/> She is happy to get a bag.<br/><br/> She is happy with her bag.<br/><br/> She is happy because she bought a bag.