Which of the Following Is a Grant from the Government

Which of the following refers to any word,name,symbol,or device or any combination thereof adopted and used by a manufacturer or merchant to identify his goods and distinguish them from goods manufactured or sold by others? A)Copyright B)Certification mark. C)Trade secret D)Trademark E)Patent

Which of the following is true of patents? A)Patent law is enacted by the Congress under the power given by Article V of the Constitution. B)A patent gives an inventor exclusive rights to make,use,or sell an invention for twenty-five years. C)Processes may be patented but not machines. D)A composition of matter is found in nature and can be patented. E)A design patent gives the owner exclusive rights to use the design for fourteen years.