Marie agreed to a contract in which she can lease a house for a period of two years and then has the option to buy the home if she can secure financing. What type of contract is this?

The four phases of an environmental site assessment are, in order:  

A legally competent party to a contract will:  

John is a landlord. He has an applicant for an apartment who uses a cane. John tells her that she should go to the complex across the street, as they have more first-floor units available, and he doesn't want her to have to climb the stairs in his building. She thanks him for the tip. Evaluate.

Four investors agree to co-ownership of an investment property. They have arranged the ownership structure so that if one of them dies, the decedent's ownership stake passes to the remaining investors. What form of co-ownership do the investors have?