Identity which option in each of the following groups is punctuated correctly. 1.A. During my first three months of work, I attended three conferences, they were all required events for my training. B. During my first three months of work, I attended three conferences: they were all required events for my training. C. During my first three months of work, I attended three conferences; they were all required events for my training. 2.A. I need to know if you are able to perform the following tasks of the job, revising existing marketing materials, promoting the company at trade shows, and reaching potential customers through direct mail campaigns. B. I need to know if you are able to perform the following functions of the job; revising existing marketing materials, promoting the company at trade shows, and reaching potential customers through direct mail campaigns. C. I need to know if you are able to perform the following functions of the job: revising existing marketing materials, promoting the company at trade shows, and reaching potential customers through direct mail campaigns. 3. A. The meeting started at noon, it lasted until late in the evening. B. The meeting started at noon; it lasted until late in the evening. C. The meeting started at noon: it lasted until late in the evening. 4. A. We conduct business with several East Coast companies; Worcester Tech, South Bean, and Hopkinton Teach. B. We conduct business with several East Coast companies, WorcesterTech, South Bean, and Hopkinton Teach. C. We conduct business with several East Coast companies: Worcester Tech, SouthBean, and Hopkinton Teac.