Accidental love book chapter 4 summary?

The description of the house in this excerpt gives an example of

You make a necklace using blue.purple and green beads in aratio of 1: 1: 2.you use atotal of 168 beads. how many green beads are in the necklace

Which statement best explains the function of the subtitlein this text? a.it provides additional information that narrows the focusof the text.b.it draws attention to important information in the table ofcontents.c.it introduces the various sections that appear withineach chapter.d.it explains the author's primary reason for writing aboutthis topic.correct (a)