Verbal Aptitude

Choose the sentence that maintains parallel grammatical structure:

Options:

• (A) The project involved surveying the topography, testing the soil, and drafting the canal layout.
• (B) The project involved surveying the topography, to test the soil, and drafting the canal layout.
• (C) The project involved to survey the topography, testing the soil, and drafting the canal layout.
• (D) The project involved surveying the topography, testing the soil, and canal layout draft.