SCENARIO: Development bought for $1 a condemned urban building, intending to convert it into apartment housing. Mr. D of DD Development telephoned ABC Engineering, Inc. and spoke to Ms. A. After brief negotiations, Mr. D and Ms. A signed a contract for ABC Engineering, Inc. to provide engineering services. While Mr. E, an employee of ABC Engineering, Inc., was inspecting the building, the floor gave away and Mr. E fell and was injured. Mr. E sought compensation from (1) his employer (ABC Engineering, Inc.), his boss (Ms. A), (3) DD Development, and (4) Mr. D personally. Ms. A now decides agreeing to the job was an unwise decision and calls Mr. D to cancel the contract. In response, DD Development and Mr. D sue ABC Engineering, Inc. and Ms. A for breach of contract. Some of the legal issues this scenario uncovers include the following:

QUESTION: Did either Mr. D or Mr. A have authority to sign the contract?

Please do not copy paste answers from another question. It is a similar prompt but a different QUESTION.