Basis for the visa classification for a new LCA to be requested


I am currently working under an OPT which will expire in three months. My company filled a LCA about a year ago since I wanted to change to an H1B1 Visa on a trip I was making to Chile. Unfortunatelly, although it was aproved we didn’t receive it on time for my trip, so now we are planning to fill a new LCA for a longer period of time. Given that this is for the same person and it is an extension of a pre-aproved LCA, we are not sure which basis we should indicate on section B, part 7 of form 9035E.

Thank you for your advice.