I believe it's B. Carefree days of a happy childhood
The Answer is C.
The <em>physicians and surgeons are professionals</em> that studied many years and dedicated a lot of attention and efforts to learn important scientific knowledge. To practice their profession, they will need <em>additional skills</em> to be able to manage the many aspects of this work: talking with the patients, having an organized office, take important decisions etc.
1:b revising 2:c proof reading 3:a checking for spelling errors 4:<span> D. a step by article about pet grooming written for pet lovers digest. 5: d editing/proofreading</span>
D. Is correct. The thesis statement is what your entire essay/paper will be about!
