Which CSS selector should you use?

You develop an HTML application that contains a table that displays a list of products. The table is defined with
the following HTML markup:

You must style the table to look like the following image:

You need to implement the CSS selectors to select the rows that must have a blue background.
Which CSS selector should you use?

A.
tr : first-line, tr :last-child

B.
tr [line |=0, 1, 3]

C.
tr: nth-child (0) : in-range, tr: nth-child (3) : in-range

D.
tr: nth-child(3n+1) {background-color : blue;}