What type of procedure should we use, t or z?

A entomologist is analyzing the venom of worker bees. She would like to know if the average histamine content is greater than 300 nanograms. The following is data on histamine content in nanograms from 7 eight day old worker bees: 649, 832, 418, 530 , 384, 899, 755.

A) One sample z test for a mean

B) One sample t test for a mean

C) A matched pairs t test for the mean difference