After yates married william ward yates in 1889, she had two children and stayed devoted to learning and literature. how is the underlined gerund used in this sentence? a. as the object of a prepositional phrase b. as an adjective modifying literature c. as the verb in an infinitive phrase with to d. as the main verb in the sentence

Photography has changed its subject matter quite a lot over the past few years. in the 1800's, it was considered normal for families to have  post mortem photos of their loved ones, and now that would be completely unacceptable. i think that photographers have always pushed boundaries and have been eager to capture everything, it is just society that changes their boundaries.

Any choices to answer ?