This script correctly models the specified requirements using Constraint Modeling Language (CML). The relation rooms : Room[1..5] line accurately sets the cardinality to require at least one and at most five rooms. The order (LivingRoom, Bedroom) clause correctly enforces the specified instantiation sequence. The relation bathrooms : Bathroom[2] line correctly constrains the model to have exactly two bathrooms. The type hierarchy, where LivingRoom, Bedroom, and Bathroom inherit from Room, is also correctly defined using the colon (:) notation.

A. This option is incorrect because the cardinality for rooms is [0..5], which allows for zero rooms, violating the "at least one" requirement. Additionally, the order clause is reversed.

1. Salesforce Industries CPQ Developer Guide, "Constraint Modeling Language (CML)": This document outlines the syntax for CML.

Section: Relations and Cardinality: It specifies that cardinality is defined using brackets, e.g., [min..max] or [exactnumber]. The requirement for "at least one and at most five" is correctly written as [1..5], and "exactly two" is [2]. Option A's [0..5] is incorrect.

Section: Order Keyword: This section explains that the order keyword is used within a relation definition to specify the instantiation sequence of related types. The syntax order (Type1, Type2) is shown, which matches the correct implementation in option B.