Turbo 4 with the 6spd. But if she wants space, recently looked into the Mazda CX-5 for my mom (50s boomer mom, around the same height).
A Crossover with a 6spd STICK!? Yep.. someone caught the performance niche audience with a crossover. Granted it only has a 155 horse 4 pot but eh.. for a commuter crossover capable of 24/30+ so on average 28mpgish it's just as good as our Milan (with a better driveline, unlike the ford

).
Thing is
Chevy just has more power coming out of their engines for the size, so I wouldn't be surprised if a similarly built Equinox could run circles around the CX-5.
So in the end, Sonic with the Turbo 4. May suffer a bit on fuel, but the driving fun is there for the commute as is the space.