I believe b is the correct answer
Mr.Frank gave Anne the diary after they moved into the Secret Annex to write down her thoughts and whatever was on her mind.
Peter and Anne have a delicate relationship at the beginning,( and they often argued!), but later, they become more affectionate towards each other.
<u>They</u> walked slowly down the crooked <u>street</u> with the rickety <u>stroller</u> and crying <u>toddler</u>.
Let's identify the reason why Mary cries when sick according to her age.
If Mary is an infant, she's crying because she probably wants water.
If Mary is an adolescent, she probably wants her Ma.
If Mary is an adult, she cries when she's sick because she is tired.
So, how old is Mary?