Answer:
The correct answer is <u>D</u>: la papelería.
Explanation:
The correct answer is D because <em>la papelería</em> is the stationery shop (the place where we buy writing materials), e.g. a notebook (un cuaderno).
<em>Tienda de ropa</em> means the <em>clothing store</em>, so we would use it to buy some clothes, not a notebook;
e.g. <em>Compra una falda en la tienda de ropa.
</em>
<em>Una hoja de papel</em> means <em>a sheet of paper</em>, so it can not be considered as the correct answer, while <em>los materiales escolares</em> refers to <em>the school supplies</em> which is not the place where we can buy a notebook.