Which is the best version of this sentence? a) elizabeth buys all the ingredients and then prepared the meal for her grandmother's 90th birthday party. b) elizabeth bought all the ingredients and then prepares the meal for her grandmother's 90th birthday party. c) elizabeth bought all the ingredients and then prepared the meal for her grandmother's 90th birthday party. d) elizabeth was buying all the ingredients and then prepared the meal for her grandmother's 90th birt

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

i would pick a. i think this is more of a personal question though.

i think the first one, it makes the most sense.