Final answer:
Option (c) 'I went to the grocery store; meanwhile, my friend was coming to surprise me at my house.' is the correctly punctuated sentence, using both a semicolon and a comma correctly.
Step-by-step explanation:
The correct way to rewrite the sentence with all the necessary commas and punctuation is: "I went to the grocery store; meanwhile, my friend was coming to surprise me at my house." This sentence uses a semicolon correctly to link two independent clauses and includes a comma after the conjunctive adverb 'meanwhile' as per grammatical rules. The option that reflects this correct punctuation is option (c).
When dealing with complex sentences and punctuation, such as linking clauses with a semicolon or using transition words, it's important to remember rules such as placing a comma after conjunctive adverbs. Making sure that each independent clause stands on its own yet is correctly linked to the adjacent clause for clear communication is key in punctuating sentences correctly.