The phrase "about the only option" is correct and usable in written English.
It can be used to indicate that there is very few choices available, often implying that the option mentioned is the most viable or significant one.
Example: "Given the circumstances, taking the bus is about the only option we have left."
Alternatives: "practically the only choice" or "nearly the sole option."
Since Germany has effectively ruled out a fiscal expansion to revive the euro zone, quantitative easing leading to devaluation is about the only option left to prevent a calamity.
About the only option Obama forswore was tacitly or explicitly reversing course and aligning with Syrian dictator Bashar Assad, whom Obama nearly attacked last year, against their common foe.
And since the Fed had already reduced its target interest rate — the federal funds rate — almost to zero per cent, injecting hundreds of billions of newly created dollars into the financial system via bond purchases was about the only option available.
About the only "option" list items are color and transmission choices.
The Mac maker hasn't always had the best luck in creating accessories and add-on kit for its own gadgets, but in the case of these cases and those for the iPhone 5s that preceded it, they're now just about the only option I'll look at in this category (though I generally prefer to go caseless).
Those were about the only options for even a college-educated woman.
The program was scheduled to make its debut in about a week; the only option was to hire Como for the show.
Despite many environmentalists' misgivings about the industry, the only option for providing more healthy seafare while possibly relieving the pressure on ocean stocks is a better aquaculture, says Mike Rust, who supervises the aquaculture research program for NOAA in Seattle.
If you are serious about toast and it is, perhaps, the only thing you should be serious about, grilling it is the only option.
The only option is to stumble about, crashing against boundaries, until we learn to navigate in this mirror world.
This may seem to concede a great deal, but for someone who is a relativist through and through, or at least is a relativist about metaethical claims, this would be the only option.
