OA: B
Errors:
A)
i) Others(usage): caring for children is not the correct usage better usage is providing care for children
ii) Idiom: estimate of is incorrect estimated is correct idiom
iii) Tense: Use of past tense increased is incorrect as the sentence talks about an event happening in the past(throughout last decade) and it is still continuing in the present(with families now spending) thus it needs a present continuous tense
B) Correct No error
C)
i)Others(usage): caring for children is not the correct usage better usage is providing care for children
ii)Tense: Use of past tense increased is incorrect as the sentence talks about an event happening in the past(throughout last decade) and it is still continuing in the present(with families now spending) thus it needs a present continuous tense
iii)Meaning: The original sentence implies that the families are spending 25 billion currently but this option distorts meaning by using past tense that families spent 25 billion this is blatantly incorrect
D)
i) Misplaced modifier: collective estimate. Placement of collective next to estimate distorts the meaning. Collective should modify spending
ii) Idiom: Estimate of is incorrect. Estimated is correct usage
E)
i) Tenses: Families spent same error a In C iii)
iii) Tenses: Increased same as in A iii)
Thus B is the correct ans