According to Belsky (1988, 1992), full-time child care (more than 20 hours per week) Is not linked to emotional development in later childhood.

Is linked to increased risk for emotional problems in later childhood.

Has not been studied.

Is not related to attachment.

during the hitler era and it caused them to declare war on germany

i think the answer is   b.

answer: in 1900, there were no "workplace safety laws"!

explanation: at the beginning of this century, workers in the united states faced remarkably high health and safety risks on the job.

a century ago in 1900 about three hundred out of every one hundred thousand miners were killed on the job each year.

[industria] developments occurred within a legal and regulatory climate that diminished employer’s interest in safety. as a result, americans developed production methods that were both highly productive and often very dangerous.