Property a and property b share a common wall along the property boundary. to ensure that neither owner destroys the wall, the owners of a and b should create: ) an easement by necessity. b) a perpetual encroachment. c) a license. d) a party wall easement.

a party wall easement.

Explanation:

A party wall is a dividing wall between two adjoining buildings that is shared by the occupants of each residence or business. A party easement however is a contract that binds both parties from the above from destroying the wall without consensual agreement, giving each party title to one half of the wall(the part facing each party's building) and some sort of coming interest in the adjoining wall.

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.

b hope this