I'll give you a question, please answer with step-by-step reasoning process. What could a massive building be if it is not constructed well?\nOptions:\n- insubstantial\n- massless\n- dwarf\n- inconsequential\n- good

User
Insubstantial means something not soild or strong in worth. Even if the building is massive, if it is not well constructed, no one would go there making it useless and insusbstantial.
The answer: insubstantial.
Assistant