ll writers since Chaucer have come from the middle class… have had good, at least expensive education….”
Where has Virginia Woolf explained it?

The correct option is The Leaning Tower.

Detailed Explanation:
Virginia Woolf's quote, "all writers since Chaucer have come from the middle class… have had good, at least expensive education…", is from her essay titled "The Leaning Tower".
This essay was originally delivered as a paper to the Workers' Educational Association in Brighton in May 1940. It was published in The Folios of New Writing later that year and was subsequently collected in the posthumous volume The Death of the Moth and Other Essays (1942).

In "The Leaning Tower", Woolf examines the relationship between social class, education, and literature. She presents a historical analysis showing that almost all major English writers since the time of Geoffrey Chaucer have belonged to the middle class and received a formal, expensive education. Woolf uses the metaphor of a "tower" of gold and privilege to describe the comfortable structure that supported these writers. She argues that this class-based education provided them with a secure angle of vision, but also notes that by the 1930s, under the pressure of global conflict and changing social realities, this tower began to lean, creating a sense of instability and intense self-consciousness among the writers of that generation.