The answer is D: The search for self.
Although this is not an exclusively literary modernist theme, it sure was one of the main themes that Virginia Woolf, one of the most notable modernist writers, developed. Throughout this novel, and specifically in the excerpt cited, Mrs. Dalloway, as well as many other female and male characters, continually expose their train of thoughts (“stream of consciousness” as it usually is called in literary studies) as the struggle to identify their personal subjectivity, showing a constant struggle and an intermittent quest for one´s own self.
Its comparing your body to the car, if you take care of it you should take care of yourself.
Your food to gas
Your organs to the parts in a car
Your pride for your body to the pride of your car
This looks like it is written in Iambic Pentameter.