Your family owns a small construction company, copperbuild, that builds custom homes for an upscale architectural firm. your two cousins recently joined the family business, and copperbuild has decided to expand into the commercial building market. your uncle and cousins are preparing a proposal bid for a small shopping center on the west side of town. what should you remind your cousins about as they prepare the proposal bid? check all that apply. avoid mere mechanical descriptions. detail your expertise and accomplishments. proposals are sales presentations. avoid differentiating your services from those of your competitors.