Wiktionary
opt.
abbr. (context grammar English) (abbreviation of optative English)
Usage examples of "opt.".
If the United States opts for regime change, the Egyptians will prefer covert action, but if that is not possible, they will urge a full-scale invasion to ensure that the operation is over as quickly and surely as possible.
That said, Washington need not consider Russia a lost cause if it opts for regime change.