This sentence below is an example of a cumulative setences from a site- sentences that begin with the main clause and that follow with subordinate ideas:
Apparently Coca-Cola once contained cocaine, which in the early twentieth century was not thought to be harmful taken in small doses, especially when the dose was only 1/1400 of a grain per bottle, (which was) hardly something to give one a heavy addiction, yet still strong enough to mildly lure one to consuming the soda, which was not so different from various medicines at the time, (which was) also containing slight trace amounts of cocaine, (which was) practically unavoidable byproducts from cocoa leaves.
Questions:
1)Is the phrase following the first (which was) an adjective phrase modifying 1/1400? Could (which was/is) be included?
2)Is the phrase following the second (which was) an adjective phrase modifying medicines? Could (which was) or (which also contained) be included?
3)Is the phrase following the third (which was) an adjective phrase modifying cocaine? Could (which was/are) be included?
4)In other words, are they all reduced relative clauses? If so, I’m starting to realise how often writers omit the pronoun and the verb to be. Is this purely for style?
Thanks in advance.