Bramante would have needed the help of what type of specialist to design a structurally solid dome on St. Peter’s Basilica?

A. engineer
B. landscape architect
C. construction worker
D. scientist

A. engineer

To determine the type of specialist Bramante would have needed to design a structurally solid dome on St. Peter's Basilica, we can consider the requirements of such a project. Designing and constructing a dome requires expertise in architecture and engineering principles.

A. Engineer: An engineer would possess the knowledge and skills necessary to design a structurally solid dome. They would consider factors such as materials, load-bearing capabilities, and structural calculations.

B. Landscape Architect: While landscape architects play an important role in designing and planning outdoor spaces, they generally do not specialize in the structural design of buildings or domes. Therefore, a landscape architect would likely not be the primary specialist required for this particular task.

C. Construction Worker: Construction workers perform the physical labor involved in building projects but typically do not have the technical expertise required for designing complex structures like domes.

D. Scientist: While scientists contribute valuable knowledge in various fields, they may not possess specialized architectural or structural engineering expertise to design a dome.

Based on this analysis, the most appropriate choice would be A. engineer. Bramante would have needed the help of an engineer to design a structurally solid dome for St. Peter's Basilica. Architects and structural engineers often collaborate closely to ensure the design is both aesthetically pleasing and structurally sound.