Final answer:
Walter Senior is depicted as a man whose dreams of grandeur make him seem not firmly rooted in reality, desiring to leave behind his hardships for a luxurious life. The correct option is D.
Step-by-step explanation:
The character of Walter Senior in the provided texts suggests that he is not firmly rooted in reality and is frequently occupied with aspirations of grandeur and a more luxurious life. This is portrayed through his dreamy aspirations and chuckles at the thought of turning his back on past hardships for a life of luxury.
His hopeful nature regarding his fortunes demonstrates a man who, while perhaps loving to his children and without problems working as a servant, also harbors dreams that might not be in line with his reality. Examples from the text include his musings about becoming 'lord of all this scene of almost unimaginable luxury and splendor' and his critical view of his past as something he would gladly dismiss once achieving greatness.