From the options given below, select the option which states the correct combination of correct sentences.
I. Having been exposed to prolonged geopolitical uncertainty and volatile commodity prices, several emerging economies have gradually revised their fiscal priorities to strengthen domestic manufacturing capabilities.
II. The advisory committee, along with multiple independent experts, have recommended substantial modifications in the existing cybersecurity framework to address evolving digital threats.
III. No sooner had the central bank announced its revised policy stance than financial markets began reacting sharply to the unexpected liquidity measures.
IV. Each of the participants in the international climate summit were asked to submit a revised sustainability proposal before the commencement of the concluding session.

Sentence I is correct.
  The introductory participial phrase “Having been exposed to...” correctly refers to several emerging economies , and the sentence is grammatically sound. Sentence II is incorrect.
  The main subject is “The advisory committee” , which is singular. The phrase “along with multiple independent experts” does not change the subject-verb agreement.
  Correct usage: The advisory committee, along with multiple independent experts, has recommended... Sentence III is correct.
  The structure “No sooner had... than...” is correctly used. It properly follows the inversion pattern required after “No sooner.” Sentence IV is incorrect.
  The subject is “Each of the participants” , which is singular. Therefore, the verb should be “was” , not “were.”
  Correct usage: Each of the participants... was asked... Hence, option (c).